1. check pfx on fn name 2. auto-complete for xmlns declaration on 'x'

Author: pgfearo

sample/snippet-demo.xsl

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 xmlns:xs="http://www.w3.org/2001/XMLSchema"
+                xmlns:pre="abcd"
+                
                 exclude-result-prefixes="#all"
                 expand-text="yes"
                 version="3.0">
@@ -13,6 +15,10 @@
 
     <xsl:variable name="var1" as="xs:integer" select="25 + 8"/>   
     <xsl:variable name="var2" as="xs:integer" select="$var1 + 9"/>
+    
+    <xsl:function name="pre:test" as="xs:string">
+        
+    </xsl:function>
 
     <xsl:template match="book" mode="#all">
         <xsl:variable name="var2" as="xs:integer"

src/documentChangeHandler.ts

@@ -57,6 +57,12 @@ export class DocumentChangeHandler {
 				triggerSuggest = true;
 			}
 		}
+		if (activeChange.rangeOffset > 10) {
+			let prevChar = e.document.getText().charAt(activeChange.rangeOffset - 1);
+			if ((prevChar === '\n' || prevChar === ' ') && activeChange.text === 'x') {
+				triggerSuggest = true;
+			}
+		}
 		if (triggerSuggest || activeChange.text === ' ' || activeChange.text === '(' || activeChange.text === '[' || activeChange.text === '!' || activeChange.text === '$' || activeChange.text === '<') {
 			setTimeout(() => {
 				vscode.commands.executeCommand('editor.action.triggerSuggest');

src/xpLexer.ts

@@ -1070,6 +1070,7 @@ export enum ErrorType {
     XPathName,
     EntityName,
     XPathFunction,
+    XSLTFunctionNamePrefix,
     XPathFunctionNamespace,
     XPathOperatorUnexpected,
     XPathPrefix,

src/xsltTokenCompletions.ts

@@ -381,6 +381,9 @@ export class XsltTokenCompletions {
 						} else {
 							attType = AttributeType.Xmlns;
 						}
+						if (isOnRequiredToken) {
+							resultCompletions = XsltTokenCompletions.getXSLTSnippetCompletions(XSLTSnippets.xsltXMLNS);
+						}
 						break;
 					case XSLTokenLevelState.attributeValue:
 						let fullVariableName = XsltTokenDiagnostics.getTextForToken(lineNumber, token, document);

src/xsltTokenDiagnostics.ts

@@ -698,6 +698,14 @@ export class XsltTokenDiagnostics {
 								hasProblem = true;
 							}
 						}
+						if (!hasProblem && attType === AttributeType.InstructionName && tagElementName === 'xsl:function') {
+							if (!variableName.includes(':')) {
+								token['error'] = ErrorType.XSLTFunctionNamePrefix;
+								token.value = variableName;
+								problemTokens.push(token);
+								hasProblem = true;
+							}
+						}
 						if (!hasProblem && attType === AttributeType.InstructionMode && tagElementName === 'xsl:apply-templates') {
 							if (globalModes.indexOf(variableName) < 0) {
 								token['error'] = ErrorType.TemplateModeUnresolved;
@@ -1645,6 +1653,9 @@ export class XsltTokenDiagnostics {
 				case ErrorType.TemplateNameUnresolved:
 					msg = `XSLT: xsl:template with name '${tokenValue}' not found`;
 					break;
+				case ErrorType.XSLTFunctionNamePrefix:
+					msg = `XSLT: missing namespace prefox in xsl:function name '${tokenValue}'`;
+					break;
 				case ErrorType.AttributeSetUnresolved:
 					msg = `XSLT: xsl:attribute-set with name '${tokenValue}' not found`;
 					break;